Two different wirese having lengths `L_(1)` and `L_(2) ` and respective temperature coefficient of linear expansion `alpha_(1)` and `alpha_(2)` are joined end - to - end . Then the effective temperature coeficient of linear expansion is :

Two wires of resistance R_(1) and R_(2) have temperature coeficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effeictive temperature coefficient of resistance is

Two metal rods of lengths L_(1) and L_(2) and coefficients of linear expansion alpha_(1) and alpha_(2) respectively are welded together to make a composite rod of length (L_(1)+L_(2)) at 0^(@)C. Find the effective coefficient of linear expansion of the composite rod.

Two rods of lengths L_(1) and L_(2) are made of materials whose coefficient of linear expansion are alpha_1 and alpha_2 . If the difference between the two lengths is independent of temperature.

Two rods having length l_(1) and l_(2) , made of materials with the linear coefficient of expansion alpha_(1) and alpha_(2) were welded together. The equivalent coefficients of linear expansion for the obtained rod:-

Two rods having length l_(1) and l_(2) , made of materials with the linear coefficient of expansion alpha_(1) and alpha_(2) were welded togther. The equivalent coefficients of linear expansion for the obtained rod:-

The coefficient of linear expansion of an in homogeneous rod change linearly from alpha_(1) to alpha_(2) from one end to the other end of the rod. The effective coefficient of linear expansion of rod is

The coefficient of linear expansion of an in homogeneous rod change linearly from alpha_(1) to alpha_(2) from one end to the other end of the rod. The effective coefficient of linear expansion of rod is

The coefficient of linear expansion of an in homogeneous rod change linearly from alpha_(1) to alpha_(2) from one end to the other end of the rod. The effective coefficient of linear expansion of rod is